| 21. | The center also has the system's work trains, including a diesel locomotive that can fetch broken trains.
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| 22. | Others simply undercut the ballast, and allow for a work train to come through to dump fresh ballast.
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| 23. | Between 1949 and 1951, renovation of the bridge was carried out by the work train ! 417.
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| 24. | H 199 was used to haul the work trains that removed the track between Cross Creek and Summit.
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| 25. | It was used for snow removal, work trains and functioned as a back-up replacement for the battery locomotives.
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| 26. | A narrow gauge railway operating works trains was used in the construction of the standard gauge British Section.
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| 27. | Works trains began to run on the railway on and on the line was brought into permanent operation.
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| 28. | This enabled the use of work trains to haul up materials that were used to line Summit Tunnel.
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| 29. | The purpose of the restoration was to serve work trains for the Dyre Avenue Line signal modernization project.
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| 30. | Work trains on the Underground employ separate locomotives, some of which are dual battery / live rail powered.
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